I've played since about 2002, if memory serves. I play for awhile, grow tired of it, quit playing for several months to a couple of years before returning. When I return, I often restart with a new username.
It's always different when I come back; the engine might be the same (how overdue are we for an update?), but the users are mostly different. johngfp, biglenr, okoutlaw, antoncreston, bigkahuna, so many more are MIA...